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'Jan.'l3, 1931. A. M. MERTZA OFF ,53

' uroumc REGULATING DEVICE FOR BOILERS Filed July 27, 1928 10 INVENTOR.

wiff 6W I ATTORNEY.

I responsive element isadapted to extend iao ble element "and saidoperating lever-.are'call Patented Jan; 13,1931" a I s mian rejnnmrznitorr; or nriwf vonx, it. Y., "Assrernoni Thrvrn1tionii 'BADIATOR AnToMA ri nEeUriA'rrne nnvlcngron -Be1LF;Rs-.; L; I

n I hpplicationfiledfm 52' n nvenubii to in regulating meansfor heating apparatus and the same has forits object toprovideiasimple eflicient, and reliablegautomatio device for seal the opening in a'boiler; and which also servesxas' a support orcarrier forthethermd' responsive. element and its associated parts. Further,'-sa1d-lnventlonhasfor its object to provide, unitary idevic'e' Whose thermothrough an aperture in thegboiler and into the fluid space thereof;- and in .Which'the support for saidthernio-responsive element serves as a cover plateto seal the receiving aperture of-theboilerw, i 1 7 Further, said .'nvention has forits object to provide a device of the character specified in which the expansible-collapsible-element,

the supporting cover plate therefor, the means for securing said eX-pansible-collapsible ele-L ment to'saidcover plate,tlie operating lever and its support, and the actuating element;

interposed betweensaid expansible collapsi formed as a vunitarystructure to facilitate the easyattaching to,lor removal of the device from a boiler or heating apparatus; Other-objects will inpart; be obvious and in part be pointed-out hereinafter. To the attainment of the aforesaid Objects and ends my invention consists in the novel I features of construction, and in the combination, connection, andarrangement of parts hereinafter more fully described and then pointed out in theclaim. s

I In theaccompanyin'g drawinge a Figure 1 is a side elevation of a'domestic steam heating boiler equipped with one form of regulating device constructed accordingto and embodying. my saidinvention.

Fig. 2 an enlarged detail central section 1 In said drawings m designates a se ohje regulating device, and

Fig; 3 is atopfview a a t bi el" steam lieatingjboileri ofgthe. type i I generally :used for domestic gheating' purposes. 7' The showingthe uPperportionbf a boiler, and a thereofi',

boiler isprovided at its frontLWiththe usual openings provided with doors 12', and at. the V I rear ofthe back section with a smoke hood/13' having a check damper 14, andat the base of said'rear section with a main air inlet 15' havinga hinged dooror damperj16'.;

The rearsection of the boiler is provided at itstop orupper portion With anaperture p i a 65 V respons ve deViceIS; fThesai'd aperture'l? 17 into which is fitted an automatic'thermois provided with an annu larl recess 19,-:and a plurality oflatera'llyprojecting bifurcated .members 20.;

4 21- denotes Yamen plate atcentral threaded aperture; extending therethroughi and an annular rib" 23 extending from the under iside of said cover plate adapted to be received by the annular recess 19; of the: apery: ture17. in theboiler. f 1

Within the threaded provided; ithareduced opening 25', and laterally-extending bearing members26 Within WhlClllS pivotaliy'supported an operating lever 27 which a is .operatively connected at oneend with saidcheck' damper 1% and with said main airinlet. door or damper 16 by-a i 85.1: termediate its endswith a polygonal portion V rod 28. Thet'ubul'ar post Qlfis providedlin- 29 which latter 'isi closed at its inner end and so e an'expansible-collapsible element'or metallic bellows30 'disposedwithin-said outer vessel 7 .95" provided-' at its outer end With a :late'rallyv projecting' annular; flange 'F'30 r registering finega Suitable volatile; 0 eratin afiuidsecure.

V aperture 22* of the covgrplate2l is secured one end of atubular post orsupport 24 having "a closed upper end 1y therein. The connected'fianges 29 80 of the outer vessel 29 and the eXpansible-collapsible element 30, respectively, are received within the recessed'portion of a screw cap 32' adapted to engage with a threaded annular projection 33 extending from the under side of the cover plate '21, whereby to hold said flanges firmly clamped between the end of ,said annularprojection S3 and said screw cap '32 and the-washer 34 therein. 7

Within the closed inner end of the expansihie-collapsible element is-secu-red a disk 39 having athreaded projection 40 extending upwardly therefrom adapted for secnrement to the inner end of astem 4 1' whose other end extends upwardly within Sl1(l-GXDLI1S1flE l-C0llapsible element 30, and through the cover and having'its free end which projects out of plate 21, and hollow post 24 securedthereto,

said hollow post adapted toen'ga'ge with the -under side'of said operating-"lever 27 when said stem is actuated by the movements of said QX'PMlSiblG-GQllELPSiblQ element 80 in response to variations of the thermal'condi' tions obtaining within the boiler.

The cover plate 21 is further provided upon its under side with an annular rib 85 which i 'is adapted to fit into the-annular recess 19 in the aperture 17 ofthe boiler and rest upon a washer ti located in saidrecess.

The said stem 41 is'p-rovided within the tubular post 24 witlia should-er 42, and at its projecting portion with =a' tr ansverse pin 43,-

which shoulder and pin serve as stops'to limit the collapsing-and expanding movements of the expansible eellapsible -e'leinent 3G and r of the stem 41,

l -he lever 27 is provided intermediate its free end and pivoted portion with a counter weight 44 which is adjustablysecured in position by a look screw 45.

46 denotes-bolts whose heads 47 are loosely v engaged by the bifurcated members '20 of the boiler. threaded upperends of said bolts ext-end through'suitable apertures in the-cover plate 21 and are provided with nuts 48 which, whenscrewed down, serve to secure the cover plate 21 firmly in place to seal the aperture 17 in the boiler, and atthe same time support the entire thermo-responsive device centrally in position within the opening 17.

The operation-of the apparatus will be ob vious from the foregoing specification. It need merely be noted that when the expansibio-collapsible element is compressed or collapsed in response to temperature increase within the boiler, the stem41 will be caused to move upwardly or outwardly'and the projecting end thereof engage the under side of the lever 27 between its free end and the pivoted 'support'therefor, and to raise said end, and accordingly depress its opposite end, thereby causing the rod24 to descend and close the draft inlet door or damper 16 v and open the check damper 14in the smoke [Patent is:

hood 13. WVhen the temperature within the boiler again decreases in response to a clecrease in the temperature of the water due to the reduced rate of combustion, the opposite operation from that above described will takeplace. I I

It is to be noted particularly that my automatic regulating device, i. el, the parts comprising ithe cover plate 21,- expansible-collapsibleelement 30, stem 41,- and support 24 are combined as a unitary structure and may,:as such,be atta ched to, or removed from the boiler by merely manipulating the bolts -46,:-'andlthat thesa-i-dbolts 46 simultaneously serve to secure the cover plate 21 in place to seal the opening 17 in the boiler, and to secure the thermo 'responsive device'18 in posi- ,tion within the opening'l'l-in the boiler;

Having thus described my sai'd invention, what I cla'lm'and desire to secure by Letters The combination of aheating apparatus "having an opening therein communicating with the fluid space thereof, acover plate for sealing said opening, with a regulating device-carried bysaid cover platea-nd integral therew th and comprising a tubular support on said cover plate extending outwardly therefrom, a lever pivotallyimounted on said tubular support, an annular threaded memberdep'ending from the under side of said cover plate, a thermo-respons'v'e' device, a flange on saidthermo-responsive device, an annular threaded member embracingsaid t-he-rmo-respon'sive device and engaging the "annular threaded member depending from tus, substantially as specified.

Signed at the city of'New York, in the county and Stateof New York, this 22nd day of June, one thousand nine hundred and twenty-eight. A

ANDRE M. MERTZANOFF. 

